games/bcd/bcd.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Steve Hayman of the Indiana University Computer Science Dept.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  37  * @(#)bcd.c    8.2 (Berkeley) 3/20/94
  38  * $FreeBSD: src/games/bcd/bcd.c,v 1.8 1999/11/30 03:48:41 billf Exp $
  39  * $DragonFly: src/games/bcd/bcd.c,v 1.3 2005/08/03 13:26:19 eirikn Exp $
  40  */
  41
  42 /*
  43  * bcd --
  44  *
  45  * Read one line of standard input and produce something that looks like a
  46  * punch card.  An attempt to reimplement /usr/games/bcd.  All I looked at
  47  * was the man page.
  48  *
  49  * I couldn't find a BCD table handy so I wrote a shell script to deduce what
  50  * the patterns were that the old bcd was using for each possible 8-bit
  51  * character.  These are the results -- the low order 12 bits represent the
  52  * holes.  (A 1 bit is a hole.)  These may be wrong, but they match the old
  53  * program!
  54  *
  55  * Steve Hayman
  56  * sahayman@iuvax.cs.indiana.edu
  57  * 1989 11 30
  58  *
  59  *
  60  * I found an error in the table. The same error is found in the SunOS 4.1.1
  61  * version of bcd. It has apparently been around a long time. The error caused
  62  * 'Q' and 'R' to have the same punch code. I only noticed the error due to
  63  * someone pointing it out to me when the program was used to print a cover
  64  * for an APA!  The table was wrong in 4 places. The other error was masked
  65  * by the fact that the input is converted to upper case before lookup.
  66  *
  67  * Dyane Bruce
  68  * db@diana.ocunix.on.ca
  69  * Nov 5, 1993
  70  */
  71
  72 #include <sys/types.h>
  73
  74 #include <stdio.h>
  75 #include <string.h>
  76 #include <unistd.h>
  77 #include <ctype.h>
  78
  79 static void     printcard(char *);
  80
  81 u_short holes[256] = {
  82     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  83     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  84     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  85     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  86     0x0,         0x206,   0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,
  87     0x812,       0x412,   0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,
  88     0x200,       0x100,   0x080,   0x040,   0x020,   0x010,   0x008,   0x004,
  89     0x002,       0x001,   0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,
  90     0x022,       0x900,   0x880,   0x840,   0x820,   0x810,   0x808,   0x804,
  91     0x802,       0x801,   0x500,   0x480,   0x440,   0x420,   0x410,   0x408,
  92     0x404,       0x402,   0x401,   0x280,   0x240,   0x220,   0x210,   0x208,
  93     0x204,       0x202,   0x201,   0x082,   0x822,   0x600,   0x282,   0x30f,
  94     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
  95     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
  96     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
  97     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0,
  98     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  99     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 100     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 101     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 102     0x206,       0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,   0x812,
 103     0x412,       0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,   0x200,
 104     0x100,       0x080,   0x040,   0x020,   0x010,   0x008,   0x004,   0x002,
 105     0x001,       0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,   0x022,
 106     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 107     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 108     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 109     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x30f,
 110     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 111     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 112     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 113     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0
 114 };
 115
 116 /*
 117  * i'th bit of w.
 118  */
 119 #define bit(w,i)        ((w)&(1<<(i)))
 120
 121 int
 122 main(int argc, char **argv)
 123 {
 124         char cardline[80];
 125
 126         /* revoke setgid privileges */
 127         setgid(getgid());
 128
 129         /*
 130          * The original bcd prompts with a "%" when reading from stdin,
 131          * but this seems kind of silly.  So this one doesn't.
 132          */
 133
 134         if (argc > 1) {
 135                 while (--argc)
 136                         printcard(*++argv);
 137         } else
 138                 while (fgets(cardline, sizeof(cardline), stdin))
 139                         printcard(cardline);
 140         return(0);
 141 }
 142
 143 #define COLUMNS 48
 144
 145 static void
 146 printcard(char *str)
 147 {
 148         static char rowchars[] = "   123456789";
 149         int i, row;
 150         char *p;
 151
 152         /* ruthlessly remove newlines and truncate at 48 characters. */
 153         if ((p = index(str, '\n')))
 154                 *p = '\0';
 155
 156         if (strlen(str) > COLUMNS)
 157                 str[COLUMNS] = '\0';
 158
 159         /* make string upper case. */
 160         for (p = str; *p; ++p)
 161                 if (isascii(*p) && islower(*p))
 162                         *p = toupper(*p);
 163
 164          /* top of card */
 165         putchar(' ');
 166         for (i = 1; i <= COLUMNS; ++i)
 167                 putchar('_');
 168         putchar('\n');
 169
 170         /*
 171          * line of text.  Leave a blank if the character doesn't have
 172          * a hole pattern.
 173          */
 174         p = str;
 175         putchar('/');
 176         for (i = 1; *p; i++, p++)
 177                 if (holes[(int)*p])
 178                         putchar(*p);
 179                 else
 180                         putchar(' ');
 181         while (i++ <= COLUMNS)
 182                 putchar(' ');
 183         putchar('|');
 184         putchar('\n');
 185
 186         /*
 187          * 12 rows of potential holes; output a ']', which looks kind of
 188          * like a hole, if the appropriate bit is set in the holes[] table.
 189          * The original bcd output a '[', a backspace, five control A's,
 190          * and then a ']'.  This seems a little excessive.
 191          */
 192         for (row = 0; row <= 11; ++row) {
 193                 putchar('|');
 194                 for (i = 0, p = str; *p; i++, p++) {
 195                         if (bit(holes[(int)*p], 11 - row))
 196                                 putchar(']');
 197                         else
 198                                 putchar(rowchars[row]);
 199                 }
 200                 while (i++ < COLUMNS)
 201                         putchar(rowchars[row]);
 202                 putchar('|');
 203                 putchar('\n');
 204         }
 205
 206         /* bottom of card */
 207         putchar('|');
 208         for (i = 1; i <= COLUMNS; i++)
 209                 putchar('_');
 210         putchar('|');
 211         putchar('\n');
 212 }